In article <airliners.1996.184@ohare.Chicago.COM> H Andrew Chuang,
Chuanga@cris.com writes:
>an issue out of this. Since these tests require the engine to maintain
>certain level of thrust, the vibration that one would experience in
>windmilling cannot be any worse than that at 80 or 90% speed.
But it would be at a different frequency, and could drive
resonances in the aircraft.